Finding the Fourth Proportional to 42,817.62, 64,244.90 and 17,862.59

Step by Step Solution

1. Step 1: Write the proportion equation
   42,817.62 : 64,244.90 = 17,862.59 : x
2. Step 2: Convert to fraction form
   42,817.62/64,244.90 = 17,862.59/x
3. Step 3: Cross multiply
   42,817.62x = 64,244.90 × 17,862.59
4. Step 4: Simplify right side
   42,817.62x = 1,147,579,897.75
5. Step 5: Solve for x
   x = 1,147,579,897.75/42,817.62
6. Step 6: Final answer
   x = 26,801.58